Study and comparison of wear behaviour of Ni-Al2O3 coatings deposited by hot and cold spray

2021 ◽  
Author(s):  
Deepak Dhand ◽  
Jasmaninder Singh Grewal ◽  
Parlad Kumar
Keyword(s):  
Cold Spray ◽  
Normal Load ◽  
Sem Analysis ◽  
Wear Testing ◽  
Wear Behaviour ◽  
Boiler Steel ◽  
Spray Coatings ◽  
Pin On Disc ◽  
Constant Normal Load ◽  
Sprayed Coatings

Abstract The sliding wear of hot and cold spray nickel-alumina coatings on SA 213-T 91 boiler steel has been evaluated and compared. The investigation was conducted with pin-on-disc apparatus. The wear testing was done by varying normal loads of 30, 40, and 50N at a constant sliding velocity of 1 ms-1. Then another set of experimentation was done at different sliding velocities of 0.5, 1, and 2 ms-1 at a constant normal load of 30 N. This experimentation was designed to study the effect of varying normal loads and sliding velocities on the wear performance of coatings developed with hot and cold spray techniques. The variation of friction coefficient and wear rate with variation in normal loads and sliding velocities were plotted and analyzed. The evaluation of wear mechanisms and characteristics of Ni-Al2O3 coatings is done with the help of weight change measurements and FE-SEM analysis. The wear resistance of hot spray coatings was found better at high normal loads and sliding velocities in comparison to cold sprayed coatings.

scholarly journals Wear analysis of CNT-AL Nanocomposites using surface response method

2020 ◽  
Vol 1 (1) ◽  
Keyword(s):  
Wear Rate ◽  
Normal Load ◽  
Process Variable ◽  
Weight Percent ◽  
Wear Testing ◽  
Experimental Result ◽  
Wear Behaviour ◽  
Nano Composite ◽  
Pin On Disc ◽  
Response Method

Carbon nanotube (CNT) reinforced aluminium (Al) nano-composites were produced using powder metallurgy route with different weight percent of CNT in to the Al matrix. The wear behaviour of CNT-Al nano-composite was studied using a pin-on-disc tribometer against AISI4340 steel disc. Experiments were conducted using different sliding velocities of 0.5, 0.65 and 0.8 m/s and a normal load of 5, 7.5 and 10 N. Design Expert (DOE) version 6.0.8 was used to optimize the process variable for wear and friction test of the developed CNT-Al nano-composite using face centered central composite design based on response surface methodology and confirmed that 1.5 wt% was the optimum CNT-Al nano-composite formulations. The result showed that higher hardness value of the material showed a lesser wear rate and better wear resistance. The result showed that the wear rate of the developed nano-composite decreased with the increasing of CNT content but up to 1.5 wt% CNT into the nano-composite. The wear rate values varied from 2-0.6 x10-3 mm3/m (2, 0.2, 0.17. 0.3 and 0.6 mm3/m x10-3 for 0 wt%, 1 wt%, 1.5 wt%, 2 wt% and 2.5 wt% CNT respectively). These results also showed that the rate of wear decreases with the increase in normal load and sliding speed. DOE confirm the accuracy of the experimental result for the evaluation of the developed CNT-Al nano-composite. Keywords: Wear testing, Sliding wear, Wear modelling, Metal-matrix composite and CNTAl nano-composite

scholarly journals Wear on Thermal & Plasma Spray Coated Al-2014 Alloy under Dry Sliding Conditions

2019 ◽  
Vol 9 (1) ◽  
pp. 2074-2077
Keyword(s):  
Thermal Spray ◽  
Plasma Spray ◽  
High Velocity ◽  
Fine Particles ◽  
Testing Machine ◽  
Thermal Spray Coatings ◽  
Wear Testing ◽  
Wear Behaviour ◽  
Spray Coatings ◽  
Pin On Disc

In this paper, wear are common problems encountered in the piston. Thermal spray coatings re one of numerous methods for alteration of part's surface properties. The innovation relies upon the standard of dissolving and speeding of fine particles and their quick cementing delayed consequence on the substrate. Among every one of the strategies of thermal spray coatings, High-Velocity Oxy-Fuel and Plasma spray procedure is broadly utilized in different applications. In this research, chemical powder with explicit properties against wear was chosen, and it was showered with high velocity oxygen fuel (HVOF) and plasma spray strategies onto Aluminium 2014 alloy substrates. Both the coatings have same binder with equivalent rate. The coatings were portrayals were done with the help of Scanning Electron Microscope, X-ray Diffractometer, and Pinon-disc wear testing machine. A pin on disc machine was used to analyse the wear behaviour by applying 10N and 20N loads.

Effect of Sliding Velocity on Wear Behaviour of TiAlN Coatings

2016 ◽  
Vol 1137 ◽  
pp. 24-38
Author(s):  
Jasmaninder Singh Grewal ◽  
Buta Singh Sidhu ◽  
Satya Prakash
Keyword(s):  
Metal Cutting ◽  
Normal Load ◽  
Steel Substrate ◽  
Wear Test ◽  
Wear Behaviour ◽  
Wear Volume ◽  
Tribological Behaviour ◽  
Boiler Steel ◽  
Aisi 304 ◽  
Wear Rates

In the present work TiAlN coatings were deposited by plasma spray process as titanium aluminium based nitride (Ti, Al)N coatings possess excellent tribological behaviour with respect to metal cutting and polymer forming contacts. Three coatings of TiAlN were deposited on AISI-304 grade boiler steel substrate out of which two were thin nanocoatings deposited at different temperatures of 500°C and 200°C and one conventional coating was deposited by plasma spraying. The as sprayed coatings were characterized with relative to coating thickness, microhardness, porosity and microstructure. The optical microscopy (OM), the XRD analysis and field mission scanning electron microscope (FESEM with EDAX attachment) techniques have been used to identify various phases formed after coating deposited on the surface of the substrate. Subsequently the sliding wear behaviour of uncoated, PVD sprayed nanostructured thin TiAlN coatings deposited at 500°C and 200°C and plasma sprayed conventional coated AISI-304 grade boiler steel were investigated according to ASTM standard G99-03 using pin on disk wear test rig. Cumulative wear volume loss and coefficient of friction, μ were calculated for the coated as well as uncoated specimens for 0.5, 1 and 2 m/sec sliding velocities at a constant normal load of 10 N. The worn out samples were analysed with SEM/EDAX. Wear rates in terms of volumetric loss (mm3/g) for uncoated and coated alloys were compared. The nanostructured TiAlN coatings deposited at 500°C and 200°C has shown minimum wear rate as compared to conventional TiAlN coating and uncoated AISI-304 grade boiler steel. Nanostructured TiAlN coatings were found to be successful in retaining surface contact with the substrate after the wear tests.

Wear analysis on EN8, EN9 and EN24

2017 ◽  
Vol 14 (3) ◽  
pp. 188-192
Author(s):  
Suraj R. ◽  
Jithish K.S.
Keyword(s):  
Wear Testing ◽  
Wear Behaviour ◽  
Wear Properties ◽  
Content Type ◽  
Wear Analysis ◽  
Use Wear ◽  
Specific Dimension ◽  
Pin On Disc ◽  
The Coefficient Of Friction ◽  
Time Required

Purpose This paper aims to present a comparative study of the wear properties of ferrous welded materials like EN8, EN9 and mild steel (MS). Design/methodology/approach The material is cut into specific dimension after hardfacing and is studied for the wear properties of the material. The wear testing is done on a pin-on-disc apparatus. The microhardness of the material is studied using the Vickers microhardness measuring apparatus. Findings The wear properties of ferrous welded materials like EN8, EN9 and MS are studied. It is found the MS has the least wear when compared to EN8 and EN9. The microhardness of MS is higher than EN8 and EN9, thus making it more wear-resistant than EN8 and EN9. The coefficient of friction in the dry sliding condition is found to be constant throughout the experiment. Research limitations/implications Major restriction is the amount of time required for use-wear analysis and replication experiments that are necessary to produce reliable results. These limitations mean that the analysis of total assemblages with the intention of producing specific results, especially of worked materials, is not feasible. Practical implications Generally, the complexity and rigour of the analysis depend primarily on the engineering needs and secondarily on the wear situation. It has been the author’s experience that simple and basic wear analyses, conducted in the proper manner, are often adequate in many engineering situations. Integral and fundamental to the wear analysis approach is the treatment of wear and wear behaviour as a system property. As a consequence, wear analysis is not limited to the evaluation of the effects of materials on wear behaviour. Wear analysis often enables the identification of nonmaterial solutions or nonmaterial elements in a solution to wear problems. For example, changes in or recommendations for contact geometry, roughness, tolerance and so on are often the results of a wear analysis. Originality/value The value of the work lies in the utility of the results obtained to researchers and users of the EN8, EN9 and EN24 material for their components.

scholarly journals EVALUATION OF TRIBOLOGICAL CHARACTERISTICS OF MATERIAL PREPARED BY DMLS TECHNOLOGY

2021 ◽  
Vol 2021 (4) ◽  
pp. 4941-4945
Author(s):  
VLADIMIR SIMKULET ◽  
◽  
DARINA DUPLAKOVA ◽  
ALEXANDRA KOVALCIKOVA ◽  
MICHAL HATALA ◽  
...  
Keyword(s):  
Sliding Friction ◽  
Normal Load ◽  
Steel Powder ◽  
Wear Testing ◽  
Tribological Characteristics ◽  
Wear Behaviour ◽  
Dry Sliding ◽  
Prepared Material ◽  
Worn Surface ◽  
Ball On Disc

The method of producing molten metal powder according to the European laser sintering system (EOSINT) was used to prepare the experimental material. The used powder metal material was designated EOS Maraging Steel - MS1. It is a steel powder, which is optimized especially for processing in EOSINT M 280 systems. The measurement of tribological characteristics of prepared materials was performed using the standard STN ISO 20808: 2004. The ball-on-disc dry sliding friction and wear experiments have been made on prepared materials in contact with steel ball. For the experiment, there were determined the following conditions: the value of normal load 5 N, the sliding radius 2 mm. Wear testing was carried out at room temperature 25°C using the ball-on-disc technique. Wear behaviour of the prepared material was studied in dry sliding; relative humidity was 26-28%. The normal load of 5 N; and sliding speed of 0.1 m/s was applied. The total sliding distance was 1000 m. The worn surface was analysed by confocal microscope and scanning electron microscope.

scholarly journals Sliding Response of Grade 5 Titanium Alloy at Different Speed and Load Levels

2019 ◽  
Vol 8 (3) ◽  
pp. 4013-4018
Keyword(s):  
Phase I ◽  
Normal Load ◽  
Load Level ◽  
Wear Behaviour ◽  
Grade 5 ◽  
Pin On Disc ◽  
The Coefficient Of Friction ◽  
Speed Level ◽  
Simulated Field ◽  
Titanium Grade

Titanium grade 5 alloy is being very distinct because of light weight and higher strength. These alloys are extensively used in aerospace industries. Response of these Titanium alloys under different load level and speed level during contact is required to be studied. The literature survey indicates inadequate studies on effect of load and speed during relative motion. Experiments have been conducted using Pin-On-Disc test rig in laboratory to simulated field conditions. Two load levels of 1.5kg and 3kg and three speed levels of 500,1000 and 1500rpm were maintained during experiments. Pin surface have been studied under Scanning Electron Micrograph [SEM] for understanding wear behaviour. The coefficient of friction was found to be more sensitive to the speed of sliding. At speed of 1500 rpm, irrespective of normal load, two distinct sliding phases, i.e., phase I and phase II have been observed as sliding progressed. Oxidation of wear debris, at lower speed and phase I of sliding takes place

Two-body abrasive wear behaviour of AA6061-2SiC-2Gr hybrid nanocomposite fabricated through ultrasonically assisted stir casting

2019 ◽  
Vol 53 (15) ◽  
pp. 2165-2180 ◽  
Author(s):  
A Prasad Reddy ◽  
P Vamsi Krishna ◽  
RN Rao
Keyword(s):  
Wear Rate ◽  
Base Alloy ◽  
Normal Load ◽  
Stir Casting ◽  
Hybrid Nanocomposites ◽  
Wear Behaviour ◽  
Hybrid Nanocomposite ◽  
Pin On Disc ◽  
Aa6061 Aluminium Alloy ◽  
Sliding Distance

Two-body abrasion wear rate of AA6061 aluminium alloy, AA6061-2SiC nanocomposite, and AA6061-2SiC-2Gr hybrid nanocomposites were studied using a pin on disc machine at various applied normal loads 5-20 N and 50-150 µm abrasive grit size by maintaining a constant sliding distance of 120 m. Morphology of fabricated materials, worn surfaces of tested specimens, and abrasive grit papers were analysed under a scanning electron microscope. The wear rate of the AA6061-2SiC-2Gr hybrid nanocomposite was found to be less than that of AA6061 alloy and AA6061-2SiC nanocomposite. The wear rate decreased by 19% for 50 µm, 28.2% for 100 µm, and 22.5% for 150 µm at an applied normal load of 20 N and 120 m sliding distance for Al 6061-2SiC-2Gr hybrid nanocomposite compared to base alloy.

Effect of ZnO Particles on Microstructure, Microhardness and Wear Behaviour of AA7068 Metal Matrix Composites Synthesized by Powder Metallurgy

2020 ◽  
Vol 979 ◽  
pp. 68-73 ◽  
Author(s):  
K. John Joshua ◽  
S.J. Vijay ◽  
P. Ramkumar ◽  
S. Mohanasundaram
Keyword(s):  
Powder Metallurgy ◽  
Vickers Microhardness ◽  
Matrix Material ◽  
Sem Analysis ◽  
Wear Behaviour ◽  
Matrix Composites ◽  
Zno Particles ◽  
The Matrix ◽  
Pin On Disc ◽  
Worn Surface

AA7068/ZnO composites were synthesized by powder metallurgy technique with different weight percentages of ZnO (5%, 10%, and 15%) along with as sintered AA7068. A low pressure of 318 MPa was applied for compaction and sintered at a temperature of 560°C for one hour. Microstructural behavior was studied using optical microscopy. Vickers microhardness test was conducted to find out the microhardness. Using pin-on-disc wear-tester experiments were conducted with a velocity of 1.2 m/s over a sliding distance of 2.5 km of load 5 N. Scanning Electron Microscopy (SEM) analysis was carried out to investigate the worn surface. Experimental results showed that the Vickers microhardness number have been increased to 66 by addition of 15% ZnO, which was double that of the matrix material. Wear experiments revealed improved wear resistance by the addition of ZnO particles. SEM analysis exposed that abrasion, delamination and oxidation were the predominant wear mechanisms for the matrix material and AA7068-5% ZnO composite and adhesion and oxidation for composites reinforced with 10% and 15% ZnO particles.

scholarly journals Optimization of Tribological Properties of Nonasbestos Brake Pad Material by Using Steel Wool

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
R. Vijay ◽  
M. Jees Janesh ◽  
M. A. Saibalaji ◽  
V. Thiyagarajan
Keyword(s):  
Sem Analysis ◽  
Wear Behaviour ◽  
Brake Pad ◽  
Tribological Behaviour ◽  
Steel Wool ◽  
Metallic Material ◽  
Structural Reinforcement ◽  
Pin On Disc ◽  
Low Wear ◽  
Frictional Composites

The gradual phasing out of typical brake pad material led to the spark of extensive research in development of alternatives. Henceforth we have performed a tribological study to improve the performance characteristics of the friction product (brake pad) by using steel wool, a metallic material which has an excellent structural reinforcement property and high thermal stability which are indeed required to improve the performance of the brake pad. Under the study, five frictional composites were developed and optimized using the same ingredients in an appropriate proportion except steel wool (0%, 4%, 8%, 12%, and 16%) which is compensated by synthetic barite, and the synthesized compositions are designated as Na01 to Na05. The developed pads are tested for tribological behaviour under conventional environment in a standard pin on disc tribometer. It is observed that increase in steel wool concentration resulted in high coefficient of friction and low wear rate of pad as resulted in Na05 composition. SEM analysis of the wear surface has proved to be useful in understanding the wear behaviour of the composites.

scholarly journals WEAR CHARACTERIZATION OF LM29 ALLOY WITH40 MICRON SIZED B4C REINFORCED METAL COMPOSITES

2021 ◽  
Vol 9 (11) ◽  
pp. 363-371
Author(s):  
G. Pathalinga Prasad ◽  
◽  
H.C. Chittappa ◽  
Madeva Nagaral ◽  
◽  
...  
Keyword(s):  
Normal Load ◽  
Testing Machine ◽  
Matrix Alloy ◽  
Stir Casting ◽  
Wear Testing ◽  
Wear Loss ◽  
Wear Properties ◽  
Alloy Matrix ◽  
Pin On Disc ◽  
B4c Particles

This paper deals with the fabrication and evaluation of wear properties by introducing40 micron size B4C particulates into LM29 alloy matrix. LM29 alloy based metal matrix composites were prepared by stir casting method. 3, 6 and 9 wt. % of 40 micron sized B4C particulates were added to the base matrix. For each composite, the reinforcement particles were pre-heated to a temperature of 600 degree Celsius and then dispersed in steps of two into the vortex of molten LM29 alloy to improve wettability. The Micostructural study was done by using Scanning Electron Microscope (SEM), which revealed the uniform distribution of B4C particles in matrix alloy, EDS analysis confirmed the presence of B4C particles in the LM29 alloy matrix.A pin-on-disc wear testing machine was used to evaluate the wear loss of prepared specimens, in which a hardened EN32 steel disc was used as the counter face. The results revealed that the wear loss was increased with increase in normal load and sliding speed for all the specimens. The results also indicated that the wear loss of the LM29-B4C composites were lesser than that of the LM29 matrix. The worn surfaces and wear debris were characterized by SEM microanalysis.

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